Soil-pulverizer.



W. J. DUNHAM.

SOIL PULVERIZER.

LIOATION FILED Mum. 1911.

Patented Apr. 16, 1.912.

APP

2 SHEETS-SHEET 1.

MZSS e W. J. DUNHAM.

SOIL PULVERIZER.

APPLIOATION FILED MAR. 27, 1911.

Patented Apr. 16, 1912.

2 SHEETS-SHEET 2.

WW2 688 es. I My .s'r Es PATENT orrio WILEY J. DUNHAM, OF BEREA, OHIO, ASSIGNOR TO'THE DUNHAM COMPANY, OF

IBEREA, OHIO, A CORPORATION OF OHIO. I

SOIL-PULVERIZER.

To all whom it may concern:

Be it known that I, WILEY J. DUNHAM, a. citizen of the United States of America, residing at Berea, in the county of Cuyahoga and State of Ohio, have invented certam new and useful Improvements in Soil-Pulverizers; and I hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

This invention relates to new and useful improvements in soil pulverizers and particularly to double gang soil pulverizers having the cutting edges on the rear gang spaced intermediate the cutting edges on the front gang so that the rear gang will split the ridges formed in the ground by the front gang.

The object of this invention is to provide in a pulverizer of the character set forth means for positively preventing any transverse horizontal movement of the rear gang in relation to the front gang While leaving each gang capable of independent vertical movement.

My invention also consists in 'a new and improved method of coupling the rear gang to the front gang so that the shaft carrying the disks or cutting edges of the front gang will be free from any pull or strain which might be caused by the draft of the rear gang.

My invention also consists in the features of construction and combination of parts described in the specification, pointed out in the claims and illustrated in the accompanying drawings.

In the accompanying drawings Figure 1 is a top plan of a soil pulverizer embodying my invention. Fig. 2 is an end view of the same. .Fig. 3 is a sect-ion on line 33, Fig. 2; looking in the direction indicated by the arrow. Fig. 4 is a section on line 4-4, Fig. 2, looking in thedirection indicated by the arrow. Fig. 5 is a section on line 55, Fig. 2, looking in the direction indicated by the arrow.

Again referring to the drawings 4 represents the end brackets of the front frame. These brackets are in general triangular in shape, the apex of the triangle being to the bottom. Along the top and side edges of each end bracket 4 is formed a flange 5.

The end brackets 4 are secured together by.

Specification of Letters Patent. "Application filed March 27, 1911'.

Patented Apr. 16, 1912.

Serial No. 617,123.

gang and these disks are mounted in the usual manner upon a shaft 15, as shown in F g. 3. In order that the shaft 15 may rotate freely in its own mountings and be free from any strain or pull on the part of the rear gang the said shaft is mounted as follows: On the inner face of each of the end brackets 4 near the lower end thereof are arranged journal-forming bosses 16 having sockets 1.7. The ends of the shaft 15 are journaled in the said sockets 1'7 and do not extend through the end brackets and consequently the rotation of the shaft 15 is in no way affected by the parts of the machine mounted on the outer faces of the end brackets.

On the outer face of each of the end brackets 4 is formed a stud 19, the stud being preferably cone-shaped. A bore 20 extends through the bottom of the socket 1'? and through the stud 19 and in said bore 20 is arranged a bolt 22 so that the end of the bolt extends beyond the end of the stud 19, the object of which will appear hereinafter.

The rear gang frame comprises end brackets 23 which are in general triangular in shape. the apex of the triangle being fo the top. An arm or extension 26 is formed integral with each end bracket 23 and iii the endof each arm or extension 26 is formed an opening 27 which is adapted to receive the stud 19 on the adjacent end frame of the frontgang.- The arm is held on the stud by means of a nut 28 which is secured on the end of the bolt 22, a washer 29 being preferably arranged between the nut and the end of the stud. The cutting disks 30 are mounted in the usual manner on a shaft 31 and the ends of the said shaft 31 extend through bearings 32 formed in the end brackets 23 and are secured in osition by means of cotter pins 33. The isks on the rear gang are so arranged that the cutting edges thereof are intermediate of the cutting edges of the front gang. in order that the cutting edges of the disks on the rear gang will out 'always in contact with the said members 36 and it is therefore impossible for the rear gang to twist or shift horizontally trans' versely of the front gang and consequently the cutting disks on the rear gang will always retain theirrelative positions in regard to the cut-ting disks on the front gang.

The end brackets of the rear gang are united by a cross bar 24 which is secured thereto by bolts 25. The cross bar is formed of angle iron and the bar is arranged with the flange extending upwardly. At the center of the bar 2ft is mounted a standard 38 for the seat which is bolted at its lower end to the flange of the cross bar 24 and at the upper end thereof is secured a seat 40. An iron brace 41 is secured at its lower end to the under side of-the cross bar 24 and the upper end'thereof is rigidly secured to the standard 38. The seat therefore is entirely supported on the rear gan and has no attachments or braces exten ing to the front gang. Now in practice, the front gang is made heavier than the rear gang so that when the operator is seated on the rear .gang the weight of the operator will equalize the weight of the two gangs.

. What I claim is? 1. In a soil pulveriie'r, the combination of a forward frame, a rear frame pivotally connected with the forward frame so as to have independent vertical movement, a pulverizerbrackets of the front frame, means for hold in said arms on said studs, a bar connecting said end brackets ofthe rear frame, a shaft extending between said brackets, and a pulverizer member mounted on said shaft.

3. In a soil pulverizer, the combination of bars connecting said end brackets, a shaft having its ends mounted in said journals on 'said end brackets, a pulverizer member a forward frame, a rear frame pivotally connected with the forward frameso as to have independent vertical movement, said frames consisting of end brackets connected by cross bars, a shaft mounted in each frame, a pulverizer member mounted on each shaft and an arm formed integral with each of the end brackets of the front frame and extending rearwardly in contact with the inner faces of the end brackets of the rear frame, the said arms being curved downwardly at their ends and a seat arranged on and wholly supported by the rear frame.

4. In a soil pulverizer, the combination of a; forward frame comprising end brackets, bars connecting said end brackets, bosses formed on the inner faces of said end brackets and provided with journal forming sockets, a shaft having its ends journaled in said sockets, disks mounted on-said shaft, studs formed on the outer faces of said brackets immediately 0 posite said bosses,

each stud being provide with a bore which through the bores in the said studs, nuts arran ed on the ends of said bolts, a shaft extending between the end brackets of the rear frame and disks mounted on said shaft, for the purpose set forth.

In testimony whereof, I sign the foregoing specification, in the presence of two witnesses. 4

WILEY J. DUNHAM. Witnesses:

Vrcron C. LYNCH, N. L. MCDONNELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0." 

